Floor and wood dressing machine



w. DRESDEN FLOOR AND WOOD DRESSING MACHINE Filed Oct. 17, 1922 s Sheets-Sheet 1 M H We Feb. 17,1925.

Feb. 11. 1925- 1,526,592

vN. DRESDEN FLOOR AND WOOD DRESSING MACHINE Filed 001:. 17, 192 s Sheets-Sheet 2 Feb. 17, 1925,

W. DRESDEN FLOOR AND WOOD DRESSING MACHINE 3 Sheets-Sheet 5 Filed Oct. 17, 1922 Patented Feb. 17, 1925.

" UNITED STATES WILLIAM DRESDEN, 0F MINERAL POINT, WISCONSIN.

FLOOR AND WOOD DRESSING MACHINE.

Application filed October 17, 1922. Serial No. 595,053.

To aZZ whom it may concern.

Be 1t known that I, WILLIAM DnnsDEN, a

citizen of the United States, residing at Mineral Point, in the county of Iowa and State of lVisconsin, have invented certain new and useful Improvements in Floor and ood Dressing Machines, of which the fol lowing is a specification.

The object of this invention is to provide a floor and wood-sanding and polishing machine with special means whereby the sandpaper may be more readily and easily ap plied to the roller and rigidly held thereon against displacement.

Another object is to provide means whereby the pressure of the sandpaper roller may be varied according to the nature of the Work to be done and will remain without variation in the suggested position.

With these and other objects in view, as will be hereinafter more fully set forth in the description and claims, reference will be had to the accompanying drawings forming a part of this specification, and wherein like numerals of reference designate corresponding parts throughout the several views in which:

Fig. 1 is a view in side elevation of one side of the machine, constituting the invention,

Fig. 2 is a side elevation of the opposite side of the machine,

Fig. 3 is a transverse vertical sectional view on an enlarged scale taken through the sanding roller,

Fig. 4 is a perspective view of the sandpaper holding plate,

Fig. 5 is a vertical sectional view taken through Fig. 3 on line 55, and

Fig. 6 is a view similar to Fig. 5 but only a fragmental thereof viewed from the opposite direction.

Referring to the drawings, reference numeral 2 designates the vehicle frame preferably of rectangular form open at its top and bottom, and mounted on traction rollers 1 which run along the floor, and said frame containing within its interior an elected type of suction vacuum cleaner (not shown), which may be driven from a pulley 5, and the nozzle 6 of which travels close to the surface of the floor or work u on which the machine is operated. Wood, shavings, chips or dust collected by the suction cleaner are deposited through a coupling 7 into the usual dust bag 8 which is suspended by a snap or other connection 9 from the handle 10 of the machine. This handle has a rigid connection with the pieces 12 located on opposite sides of the main frame 2, and which main frame is mounted thereon by pins 14. The pins 14 are carried by the main frame 2 while the slots 15 are inclined similarly and are provided in the side pieces 12. These side pieces 12 project forwardly of the main frame 2 and are connected bv a shaft 16 journalled in separable bearings 17, to facilitate easy removable of the said shaft 16 and the sandpaper roller 18 which is mounted thereon.

Mounted upon the shaft 16 is a grooved pulley 19 which is connected to endless belt 20 with the suction cleaner puller 5 for oper ating the latter from the sandpaper roller carrying the shaft 16, and this shaft in turn is driven by its sprocket wheel 21 from a sprocket wheel 22 of an electric motor 241 through the medium of endless sprocket chain 25. The motor is conveniently mounted on the superstructure on which the pieces 12 form a part and is in circuit with a switch 26 and service plug 27 mounted on the handle 10 within convenient reach of the attendant. The sprocket chain 25 is maintained taut through the medium of a small sprocket 28 in mesh with the sprocket chain 26 and adapted to exert pressure upon the chain due to its mounting which comprises a small lever 29 carried at one end, a sprocket wheel 28 and being pivotally mounted at its other end to some portion of the superstructure of the machine, and being under the tension of spring 30.

Upon the opposite side of the machine from that on which the sprocket gearing just described is located, is arranged the mechanism for raising and lowering the sandpaper roller with respect to the work, and includes a hand lever 31 pivoted at its lower end 32 to the main frame 2 and having connection with a side piece 12 of the superstructure by means of pin and slot connections 33 and 34:, the former being carried b the pieces 12 and the latter being provlded in the lever 31. To the upper portion of the said side pieces 12 is suitably attached a ratchet bar 35. This ratchet bar is of inverted U-shape, and the bridge portion is provided along its upper edge with ratchet teeth 36 and along its lower edge with ratchet teeth 37, the former, due to the shape of ratchet bar 35 being coarser than the latter. 'Pivotally mounted upon the lever 31 is a pawl 38, the engaging end of which is connected by means of a link 39 bears at its lower end 38 and its upper end 43 to maintain the pawls normally in engagement with the teeth 36 and 37 of the ratchet bar.

The sandpaper carrying roll 18 consists of a hollow body divided on a line to one side of .the center into two sections 18 and 18", hinged together at 60 and having their ends closed by members 61. Between the members 61 of the section 18 is journaled a shaft 62, mounting a segmental gear 63. Parallel with shaft 62 is another shaft 64 also journa'led in the same end member 61 and upon this shaft is fix-ed a pinion 65 which meshes with the segmental gear 63. The said shaft 64 extends entirely through one of the .end pieces 61 and the projecting end besides being square to receive the range or operating handle, is equipped with a ratchet wheel 66 which is connected by a dog 67 carried by a pin 6:8 which extends entirely through the end piece 61 and has its rear or inner end headed at 69 and surrounded by a spring 70 which normally holds the dog 67 connected with the ratchet wheel 66. The end of the pin 68 carrying the dog 67 is provided with a handle 71. The shaft 62 has extending from it arms 75, one of these arms being located on each side of the segmental gear 63, and each l1aving pivotal connection with sleeves 76 slidingly mounted on rod 77. The rear end of each rod 77 is headed at 78 and carries a coil spring 79 between said head and sleeve 76. The opposite ends of these rods 7 7 have pivotal connection with rod 80 which ex- Upon the pins 18 is mounted a plate 90, the.

same having aperatures 91 to receive said pins 18", and also having notches 92 to acco nmodate the pins 18 of the section 18".

The lower portion of the plate is webbed with a pair of apertures 93 for connecting the ends of a pair of coil springs "'94 secured at 95 to the wall of the section 18" adjacent the hinge 60.

In operation, the switch 26 is thrown and the motor started, transmitting -motion through the sprocket chain 25 to the sandpaper roll 18, which in turn transmits motion through the belt'20 to the driving pulley 5 of the suction cleaner. The attendant depresses the handle'42 which lifts both pa'wls 38 and 40 out of the ratchet teeth 36 and 37 justment very little at the time and holding it always securely at the adjusted height. The dust, etc. cut from the surface by the sandpaper roller 18 is collected by the suc tion cleaner nozzle. As the attendant moves the machine over the floor, this dust is col lected in the dustbag 8 from which it -may 7 be'periodically dumped. When it is desired to replace the sandpaper covering of the roller 18, the attendant releases the dog 67 from the ratchet wheel 66 and turns the shaft 64 by engaging the handle or wrench with the square end thereof. This rotation of shaft 64 causing the inion 65 to turn the segmental gear 63 an with it the shaft 62, which motion swings the arms 75 in an arcuate' path, pushing upon the rods 77 and 8().and forcing apart the sections of the roller 18. While in this position the sheet of sandpaper covering is wrapped about the two roll section, wit-h one end of the paper engaging with the pins 18 of section 18' and the other end of the paper engaging with pins 18 with the other section 18". The plate 90 is then applied to the pins 18, and it will be remembered that the roll sections are fully open, and this requires that the spring 94 be considerably stretched, whichplaces said plate under tension, and rests the plate 90 on said pins 18 with that end of the paper held between said plate and the meeting faces of section 18'. The sections 18' and 18 are then closed together. This operation is performed by rotating the shaft 64 to rotate the shaft 62 through the gear 63 and pinion 65, to swing the arms 75 into the opposite direction to close the section 18 upon the suction pins of section 18" through the rods 77 and 80, the spring 79 constantly yielding pressure to cause one section to bear firmly against the other, with the plate 90 interposed and firmly gripping the ends of the" paper 18*. By this means, the sand paper cannot slip at either end and will be drawn exceedingly taut in which condition it will do its best work. It will also be seen that locking the shaft 64 that carries the pinion 65, prevents the possibility of the opening of the roller and thus always keeps the sandpalper taut.

What I claim is:

1. A floor dressing machine comprising a main vehicle frame, a dressing-tool-mounting superstructure vertically adjustably mounted thereon, said supelstructure having inclined slots and the main frame having pins therein, and a lever connecting the main frame and superstructure to shift the same relatively and cause the pins to change their relative position in said slots and thereby efiect the stated adjustment.

2. A device of the character described in claim 1 characterized by the superstructure having a ratchet bar, and the lever having pawls engage therewith, the pawls engaging opposite faces of the ratchet bar, and the opposite faces provided with teeth, the teeth of one face being spaced farther apart than those of the other face.

3. A device of the character described in claim 2, characterized by the superstructure embodying side walls having the dressing tool supported therebetween.

4. A device of the character described in claim 3, characterized by the provision of pins on the superstructure and said lever being pivoted on the main frame and slotted to receive the pins.

5. A floor dressing machine comprising a main frame and a secondary frame, one having inclined slots, pins carried by the other and located in said slots, a lever pivoted at its lower end to one of said frames and having a slot and pin connection with the other of said frames, a ratchet bar can ried by one of said frames and having coarse teeth on one side and fine teeth on the opposite side, a pair of pawls pivoted to said lever and adapted to engage said teeth. a link connecting said pawls, a pivoted handle on said lever, a rod connecting said handle and one of said pawls, and a spring normally forcing said pawl into locking engagement with the teeth.

In testimony whereof I aflix my signature. 1.

WILLIAM DRESDEN. 

